Garret Wants to Rob a Bank
Yes, the master thief himself wants to rob a high security bank, only if you pre-order the new Thief however. The bonus mission will have you attempting to sneak in stealthy to the high security bank where you will apparently find very valuable treasures, as it promises to challenge players, so the bigger risk probably comes with a great reward. You can also challenge your friends by competing for the best time on the level, to see who the sneakiest and fastest thief is!
You can expect to play as Garret again next year around February 25th. Certainly enough time to brush up your thieving skills in the previous 3 iterations, right?